Issue 12, 2016

Hydride generation-point discharge microplasma-optical emission spectrometry for the determination of trace As, Bi, Sb and Sn

Abstract

A miniaturized optical emission spectrometer (OES) with point discharge (PD) helium–hydrogen microplasma as an excitation source and hydride generation (HG) for sample introduction was constructed for the determination of trace As, Bi, Sb and Sn. Hydrogen generated from the HG process usually consumes part of the excitation capability of a microplasma, but here it was used to effectively minimize the background spectral emission of the microplasma, thus enabling more spectral emission lines with less background spectral interferences for analysis of more elements. In addition, separation of analyte-containing hydride from the sample solvent and matrix prior to excitation in the microplasma was achieved with better sensitivity, selectivity and stability. The compact PD was constructed using two tapered tungsten electrodes powered by alternating current (ac) high voltage, and emission spectra were recorded with a hand-held charge coupled device (CCD) spectrometer. Limits of detection (LODs) of 7, 1, 5 and 2 μg L−1 and relative standard deviation (RSD) of less than 5% were obtained for As, Bi, Sb and Sn, using 234.984 nm, 306.770 nm, 259.805 nm and 317.504 nm as the analytical lines, respectively. The potential application of this miniaturized instrumentation was also demonstrated by successfully analyzing several Certified Reference Materials (CRMs) with satisfactory results.

Graphical abstract: Hydride generation-point discharge microplasma-optical emission spectrometry for the determination of trace As, Bi, Sb and Sn

Article information

Article type
Paper
Submitted
16 Sep 2016
Accepted
24 Oct 2016
First published
24 Oct 2016

J. Anal. At. Spectrom., 2016,31, 2427-2433

Hydride generation-point discharge microplasma-optical emission spectrometry for the determination of trace As, Bi, Sb and Sn

M. Li, Y. Deng, C. Zheng, X. Jiang and X. Hou, J. Anal. At. Spectrom., 2016, 31, 2427 DOI: 10.1039/C6JA00341A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements